We consider the slow-roll parameters, in the Randall-Sundrum type II
Braneworld model [1]}. The two first parameters are given for
generalized Chaplygin gas model by :
\(\varepsilon =\frac{M_{P}^{2}}{16\pi }\frac{V^{\alpha }V^{^{\prime 2}}}{(A+V^{(\alpha +1)})^{\frac{\alpha +2}{\alpha +1}}}\left[ \frac{1+\frac{(A+V^{\left( \alpha +1\right) })^{\frac{1}{\alpha +1}}}{\lambda }}{^{^{\left( 1+\frac{(A+V^{\left( \alpha +1\right) })^{\frac{1}{\alpha +1}}}{2\lambda }\right) ^{2}}}}\right] ,\) 
